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Combinação seletiva de métodos para previsão de demanda a curtíssimo prazo em tempo real
(Universidade Federal de Santa Maria, 2015-03-06)
In transforming the current electricity network, in a so called smart grid, demand forecasting
is relevant to processes such as demand management, demand response, distributed
generation, among others. For consumers, the ...
Controle robusto baseado em desigualdades matriciais lineares aplicado a inversores conectados à rede elétrica
(Universidade Federal de Santa Maria, 2015-04-24)
This work provides as a main contribution a procedure to design robust state feedback
current controllers applied to inverters connected to the grid by means of LCL filters,
providing results which comply with performance ...
Desenvolvimento de uma família de reatores eletrônicos para lâmpadas fluorescentes sem eletrodos empregando a técnica de integração de conversores
(Universidade Federal de Santa Maria, 2012-11-30)
This paper presents the design and development of an electronic ballasts family
obtained through the use of the integration technique of converters for feeding the
electrodeless fluorescents lamps (EFL). This type of lamp ...
Novo conversor CC-CC integrado full-bridge-forward aplicado a uma microrrede residencial
(Universidade Federal de Santa Maria, 2013-02-07)
This Ph.D. Dissertation focuses on the proposal of a novel converter topology applied
to the connection of an energy storage system, composed of a supercapacitor bank and a
battery bank, to the dc bus of a residential ...
Projeto de conversores estáticos fazendo uso de uma metodologia de minimização de volume/perdas/custo
(Universidade Federal de Santa Maria, 2013-08-29)
This thesis presents a new optimization design methodology for power electronics
converters with volume, cost and efficiency objectives. The optimization methodology,
achieved by mathematical interactions, is based on the ...
Controle adaptativo robusto de estrutura variável por modelo de referência aplicado a filtros ativos de potência
(Universidade Federal de Santa Maria, 2010-08-27)
This works presents a Robust Variable Structure Model Reference Adaptive Control scheme denoted VS RMRAC. In this adaptive control strategy, each parameter of the control law is obtained by the sum of two other adaptive ...
Contribuição ao estudo do gerador de indução duplamente alimentado: operação durante distúrbios na rede elétrica
(Universidade Federal de Santa Maria, 2010-08-30)
The Doubly Fed Induction Generator (DFIG) is one of the most frequently deployed large grid connected Wind Turbines (WT) concept. The implementation of classical
vector control techniques, have been proven to work well for ...
Síntese e caracterização de zeólitas ZSM-5 por diferentes rotas e seu emprego na produção de olefinas leves a partir de etanol
(Universidade Federal de Santa Maria, 2014-08-12)
This work aims the synthesis and study of ZSM-5 catalysts for the conversion of
ethanol to light olefins, especially, using an alternative and inexpensive route. The
ethanol emerges as a renewable source for the production ...
Intervalos de predição no modelo beta autorregressivo de médias móveis
(Universidade Federal de Santa Maria, 2016-02-25)
Usual point and interval forecasting based on the autoregressive integrated moving average
models (ARIMA) may not be suitable for modelling variables defined over the interval
(0, 1). In fact, such forecasting effect ...
Controle adaptativo robusto por modelo de referência aplicado ao controle de velocidade e de posição de motores síncronos a ímãs permanentes
(Universidade Federal de Santa Maria, 2011-08-26)
This work proposes two vector control schemes for permanent magnet synchronous
motors. They are destined to speed and position control, respectively, and are based on a
control law called VS-RMRAC. Not being yet applied ...